Ok, don't forget Fring yet as it is a pretty good "all-in-one" app. But if you are using Fring solely for the Skype calls feature, then you might want to give a try at TruPhone, a VoIP app that was the first of its kind to be approved in the App Store.
So, what's so good about TruPhone? Well, I guess the best feature of this application is that it allows you to make VoIP calls from your iPhone to any phone in the world over wifi, and most importantly you can make calls even if you are not in a wifi zone. Now I have to admit this part is a bit shady. I had a look at Truohone's website and I can't figure out how this works exactly. It doesn't say anything about 3G or Edge but it does say that you can make calls even if you don't have an Internet connection. It's confusing but it still sounds great!
Fring allows you to do pretty much the same (and actually more) but the problem with Fring is that the app doesn't let you make VoIP calls over 3G or Edge, unless you implemented my Fring hack, of course... It seems that TruPhone is making this possible, without having to hack anything.
Let's have a look at what TruPhone can do for you:
Cheap international calls
The Truphone iPhone app routes iPhone calls over the Internet which can save you loads of money on international calls from your home country and on calls when you're abroad. You can look at the rates here. Calling a landline in my home country (France) is $0.06/minute but calling a cellphone there is $0.30/minute. All calls in the US are $0.06/minute.
Use Truphone Anywhere
If you're not online Truphone Anywhere can still route your call over the internet. So now you can make cheap VoIP calls even when you're not connected to a Wi-Fi network. How does that work? I'm not sure...
Free calls worldwide
Calls to other connected Truphone users are FREE, worldwide. So if you and your friends all download Truphone, you can call each other for FREE, wherever you are in the world!
Know who's online
A new feature lets you know which of your Truphone contacts is online. It's great news if you want to make FREE Wi-Fi to Wi-Fi calls on your iPhone because calls between connected users are always FREE Worldwide.
Receive calls for free
You can receive FREE Truphone calls whenever you're connected to a Wi-Fi network.
iPod Touch users for once shouldn't feel left aside. If you have a headset with a microphone you can also use this great app on your iTouch, which means that you can turn your iPod Touch into a phone!!!
Truphone is free and you may click here to download Truphone for iPhone or Truphone for iPod Touch.
One question still lingers in my mind though... Is AT&T ok with that?